Key clinical point: Individuals undergoing allogeneic blood or marrow transplantation (BMT) in childhood require careful follow-up for many years because of a persistent elevated risk of premature death.

Major finding: Risk of premature death was increased 14.4-fold, compared with the general population (95% confidence interval, 12.8-16.1).

Study details: A retrospective cohort study including 1,388 individuals living 2 years or more after allogeneic BMT performed in childhood.

Disclosures: The study was supported in part by grants from the National Cancer Institute, the Leukemia Lymphoma Society, and the Swedish Childhood Cancer Foundation. Dr. Holmqvist and her coauthors reported no conflicts of interest.